On different places with different speed the time is different.I saw professor Steven Hawking tell that.If we speed up enough we can move trough the time.Everyting will be slow to us and if we have enough speed we will disappear to the others.

Flamechy wrote:On different places with different speed the time is different.I saw professor Steven Hawking tell that.If we speed up enough we can move trough the time.Everyting will be slow to us and if we have enough speed we will disappear to the others.

No, we can't. Speeding up can't revert all matter to a previous state.

Flamechy wrote:On different places with different speed the time is different.

True ,time is relatavistic.

Flamechy wrote: If we speed up enough we can move trough the time.

Proven. If we take two identical atomic clocks; one we leave stationary, the other clock, we fly it round the world on a jet.Then when the two are compared, the jet set clock will be found to be running a millionth of a second or so, behind the stationary one (Hafele–Keating experiment).

Flamechy wrote:Everyting will be slow to us and if we have enough speed we will disappear to the others.

I'm pretty sure thats an episode of Star Trek.Anyway: There are several solutions to Einsteins General Relativity equations, that allow time travel. One of which is; you get an iron cylinder roughy 10,000 miles long with a diameter of a thousand miles, rotate itabout its vertical axis, to approximately 80% the speed of light, and it will then form vortices of space-time(much like the ripples of bath-water that form when you pull the plug out) at certain points along the cylinder,these 'ripples' will aquire the mathematical properties that equate to going backwards in time.Whether you could ride the rippples is another matter.

However General Relativity is not a complete explanation of the universe,General Relativity cant explain how your phone works nor how any transistor works (quantum tunneling, it's cool!).The equations of General Relativity just wont work with small stuff.That's where Quantum Mechanics steps in, and does the math that makes your phone work.But Quantum Mechanics wont explain the big gravity,space-time stuff. These two theories work on their own turf but wont join together to form a coherent explanation of the universe.

So to sum up, General Relativity says time travel is possible, Quantum Mechanics has little to say about time travel,neither theory is a complete explanation of the universe.Without a complete or coherent explanation of the universe (space-time,entropy,etc).The question of whether time travel is possible or not, is an open one.

I'm young therefore i dont know physics and the likes but any of those believers of time travel tell me: Why hasn't any one come back yet? Sure they may not want to but thats probably not why. I would also love to have a great debate with someone who thinks we have to progress in time first. Message me

Even something as small as a displaced rock or something can, over time, have massive implications. Anyone coming back in time would probably cause all sorts of paradoxes. I think matter works in a linear fashion. One thing affects the next thing, affects the next thing, etc. Thing 100 doesn't go back and affect thing 2.

Here's a thought: If time travel were possible (going back in time anyway) then wouldn't there have been tons of travelers from the future by now? If, say, they discovered a way to in 2510, then from that time until the end of civilisation how many would there be? Surely at least a few would have made themselves known by now.